Better error message if I provide an incompatible sdtype/locale combo

[npatki]

Environment Details

• SDV version: 1.5.0
• Python version: 3.10
• Operating System: Linux (Colab Notebook)

Error Description

Certain sdtypes are not compatible with certain locales. For example the state_abbr sdtype is supposed to indicate a 2-digit code for a state. But not all countries have states -- for example in Great Britain doesn't have states. In this case, the synthesizer crashes with an AttributeError.

Expected Behavior

I expect a more easy-to-parse error such as:

SynthesizerInputError: The sdtype 'state_abbr' is not compatible with any of the locales. To continue, 
try changing the locales or adding 'en_US' as possible option.

Steps to reproduce

from sdv.metadata import SingleTableMetadata
from sdv.single_table import GaussianCopulaSynthesizer
import pandas as pd

metadata = SingleTableMetadata.load_from_dict({
    'columns': {
        'A': { 'sdtype': 'numerical' },
        'B': { 'sdtype': 'state_abbr' }
    }
})

data = pd.DataFrame(data={
    'A': [23.34, 12.40, 14.27, 19.40, 21.40],
    'B': ['CA', 'CA', 'MA', 'MA', 'NY']
})

synth = GaussianCopulaSynthesizer(metadata, locales=['en_GB'])
synth.fit(data)

Output:

AttributeError: 'Generator' object has no attribute 'state_abbr'

Stack Trace:
stack_trace.txt